Question

please answer the question ​

Answer 1

Answer:

In △ABC, ∠ABC + ∠ACB + ∠BAC = 180° 69° + 31° + ∠BAC = 180° ⇒ ∠BAC = 180° – 100° = 80° ∠BDC = ∠BAC (Angles in the same segment) ∴ ∠BDC = 80°